抄録
Studies have demonstrated a large dependence of sweet potatoes on arbuscular mycorrhizal fungi (AMF), highlighting the growth-enhancing effects of AMF on sweet potato plants. However, compared to other annual upland crops, such as soybean, maize, and Welsh onion, there are limited studies on mycorrhizal associations with sweet potatoes. Therefore, further accumulation of fundamental ecological data is necessary. In studies on endophytic diazotrophic bacteria (EDB) in sweet potato plants, a considerable number of isolates and genetical analysis data have been obtained. Inoculation studies using these EDB isolates on sweet potato plants have shown some growth-promoting and yield-enhancing effects. Additionally, endophytic bacterial antagonistic functions have been observed, increasing the disease amelioration evidence. Further EDB inoculation experiments are required to develop technologies that utilize EDB. We conducted a co-inoculation pot experiment using AMF and EDB during the early growth stages of sweet potato plants. AMF inoculation clearly promoted the early growth of sweet potato plants. However, no significant differences between plants with and without EDB inoculation were observed. We found that the effect of EDB inoculation, following initial AMF inoculation, on root dry weight tended to differ among strains, warranting further study. We propose that sweet potato plants are unique materials for soil microbiological research, and we expect to accelerate further studies to develop and deepen our understanding of both AMF and EDB in the ecology of sweet potatoes.
https://ror.org/023v4bd62 
